Compressor for bundled explosive material.



W. H. McCANDLlSH 61 A. B. ROBSON.

COMPRESSOR FOR BUNDLED EXPLOSLVE MATERIAL.

APPLICATION FILED JAN. 3. i917.

Patented Mar. 18, 191% 2 SHEETS-SHEET 1.

Ejl

l; I i l a W. H. McCANDLlSH & A. B. ROBSON.

COMPRESSOR FOR BUNDLED EXPLOSIVE MATERIAL.

APPLICATION FILED JAN13. I917.

Patented Mar. 18, 1919.

2 SHEETS-SHEET 2- jwentor Rm gxm J TED STATES PATENT @FFTCE.

WILLIAM HERBERT MCCANDLISH, OF LONDON, AND ALFRED BERNARD ROBSON, OFCOUNTY OF I-IERTFORD, ENGLAND, ASSIGNORS TO SABULITE (GREAT BRITAIN)LIMITED, OF LONDON, ENGLAND.

COMPRESSOR FOR BUNDLED EXPLOSIVE MATERIAL.

i To all whom it may concern:

Be it known that we, WILLIAM HERBERT MCCANDLISH and ALFRED BERNARDRoBsoN,

subjects of the King of England, and residents, respectively, of London,England, and county of Hertford, England, have invented certain new anduseful Improvements in Compressors for Bundled Explosive Material, ofwhich the. following is a specification.

This invention relates] to the compression of bundled material such asbundles of sticks of cordite or bundles of other material more I to adiameter slightly smaller than that at.

particularly when they are of small dimensions.

Cordite sticks of uniform length can be made up into cylindrical bundleswhich can be encircled by bands, for instance, of silk tied around'eachbundle, each band being at .a point intermediate between the middle-ofthe length of the bundle and its end. It is very necessary that thesebands or "t1es should encircle the bundle tightly. The

bundle has, therefore, as a preliminary to the application of the ties,to. be compressed which the ties are to retain it. While it is underthis compression the ties are applied, and upon release of thecompression. the bundle expands slightly but not more than to an extentjust sufficient to enable the ties,

, which the bundle can be readily inserted and which applies therequired compression to the bundle at the middle of its length, whileleaving the ends exposed so that the operator can readily apply the tiesto them.

According to the present invention the compressor comprises. a tensionmember secured by one end, say by its upper end, to a fixed support on awork-bench and extending from this fixed support downward to and arounda contractible circular clampn This clamp is normally kept expanded byits own elasticity, or by a spring or other means, and it virtuallyformsan intermediate round turn; portion of the tenslon memSpecification of Letters Patent.

Patented Mar. 18, 1919.

Application filed January 3, 1917. Serial No. 140,460.

ber, the tension member extending onward and downward from the roundturn to a treadle, lever or other device. When this device is operated,say by the foot of the operative, a pull is applied throughout thelength of the member which will contract the round turn upon a bundlepreviously placed therein.

The detailed construction of the compressor may take various forms asillustrated in the accompanying drawings, in which- Figure 1 is aperspective View showing a treadle-operated compressor;

Fig. 2 is a perspective view of an alternative construction of clamp;

- Fig. 3. is aperspective view'of an alternative form of clamp which isoperated by a hand-lever, and

Fig. 4 is a perspective view of a bundle Y of sticks tied together inthe manner above described.

Like reference characters indicate like parts throughout the drawings.

Referring first to Fig. 1, it will be seen that the compressor ismounted on a suitably shaped bracket A which is clamped or otherwisesecured to a table or bench B.- The clamp within which the bundle ofsticks is compressed, comprises a band of metal C bent into acylindrical form with the ends overlapping as shown at '0 this band issecured at C 011 to the front face of the bracket A near the upper endof it. The fastening C is preferably' situated nearer one end of theband than the other in order to-provide for the desired contraction andexpansion of the cylindrical clamp. The free end C of the band issecured to a tension member, conveniently by a perforated tongue Creceiving the end' of a chain or the like D. This chain passes over apulley D mounted ona suitable spindle on the bracket A and extendsdownward through an openingB in the bench B to near the ground. There itis connected to alever E constituting an operating-treadle- The lever Eis pivoted at E in any suitable manner and provided with a foot-plate EA guide E may be provided to embrace the lever E and guide it in itsmovements. A At the end C of the band there'is formed bracketAiutilizoedrto maintainit in its expanded condition. In operating thedevice a bundle of cordite sticks or the like G, as illustrated in Fig.4, is inserted into ithe band C whenthe latter is expanded; the treadleE E is then .pressed downward a-by the 'foot of [the operative and thetension in the member p,

transmitted to the flexible band 'G, causes it vt .be eet eetefit ansenses ih r und Gat about the" middle of ,its length. The

r r i e' ie i ,el seawee enr i eu T re thele e fi tha whe Ihedeei e meu.p eeame se ie l 'e n s ye i t the 1911 dle', th'e 'latch F engages theprpjection 1C eeldewh'e ba 03 a e ntiaet d ir sitionI -The operative isthus relieved of ee it fmaiete niea nreeee epi the lti eadle EEE" dur ngthe rest of the operanot." When the "bu dle is compressed, threads ofsilk o r thetllke'Gr are'tied around the bundle G intermediate, of themiddle of its length and its ends, as shown in 4. "\Vlien' these havehentied, the operative lifts the latch F. to rlease'the which thenexpandsflbfy lvrtue of its own resiliency are the bund "e" G is readilyrenioved and a new bundle inserted inits place. This cycle of operationsis't -henfrepelated.

' In the modification illustratedinl ig. 2, the clamp is constituted bytwo parallel turns of wires. The Wires ELI-I are secured by theirendsneanthetop of the bracket A and extend downward therefrom; and thenoutward 'into a circle and back'to lie against the face of the bracketOne or'more spacing pieces H may be secured to the wiresto maintain themat the correct distance apart. The lower ends of the wires fl 'aresecured to a cross-head J which conveniently slides on a dove-tail orother uide 'J integral with, or secured to, the th ow ends of the r -Hare thereby maintained in theinconrect position. The cross-head J isconnected 'by a tension m ember to a suitable treadle, lever or the likefor movingit downward.

Since the wires HH 'may not be sulficiently resilient in themselves toexpand the clamp, after it has been contracte'd, a tis pring is attachedto the cross-head I anapto the bracket A, and is so arranged that it isstrained when the cross-head J noved downward to contract. the clampingwires.

The expansion of the. clamping wires, when released, is then efi'ectedbv was s-111 K causing the crossdiead J. to inove upward to itsbriginalposition. The ogeration of thisdevice is simil fpe with tefeseee t IFs-Il- In the modification illustrated in Fig. 3, the clamp takes theform of a band of resilient metal L secured at onefendto the bracket Aandbent into a round turn perpendicular to the face of the band. The

rband is slotted C-QlltDEllYgfit ;L here git-comme se i ee eturerand err pnud ng y uced in Width a cL Wher :1 fleas pleted its round turn. Thereduced part L Zpassesthrough.theslotIB and extends downward, ifdesired, through suitable guides, ;a1 1d,-,constitutes a tensionmember-3L 'i gll his figure illustrates an alternative method ofciperating the clamp for contracting it, a heed-lever ng reprised a tethi ne ps instead 2 ne dle a a reei ieeer i .ris e r heir rei:,.eithe.th treeelleqnth aev rn y .be-need w h any set th t ms p el np abat.deeer bell 36 :h wd-i r N is ,rqta abl manned ne, i Mien eunledtee d eei st ak; 2 9. led tie iea' iieetingae M nh eh. li in tu n aeeted t thstereiep member If i-nft e clal np. A bracket M4 maybe provideot toguidetthe.l anfiil r rMnend saeti u ees p er the .eter l e l 'eielieneeed-thatt f ereaM ieheldirenil rae tenement wh .thes 'e .kha jeetizeeeedit lenerpdeesse ter. '0 viously', instead of a disk and crank-Y..pinao i-e te k eneeeea riedie andst p ee i (equally 73716.11 be ueed- Ih @011- t er prov des an automatic lock.

..-Fro1 n foregoing itlwill be seen {that the dammed it e l end'th .ae ui gtel' vi linea ere ymnie eal eite t flT-W hr e ex i eentre ulane treeve t6 th f iaxisiofi the' boreof theplarnp' Y i r i -.What we claiasourinvention an ddesire to secure byLetters Patent lin mamas feri emnee e u d e mefieeieL-Tthv mbinatien b Le Q PiP iI jfra e esen neet eT iei le lii e u .tliere e; aw en ea n'g m e OI Q tively connected tosaidblamp to contract t sam hen te i n i ep ied el' dle i be r e d em?ins "snag me wh re'l iflifi' l bgm al yxi a l w the e s on r m ed eublteet e eer b d Q '2. In apparatusfor compressing'bundlpd material e emi ti bf e a l-par in frame, a contractiflble circular secured trereto",a tensioninember operatively engaging saiid clarn 'p so asto fcontractlit ensi n is applied to Said iii-ember, ineans'for et ii ei ilie s 1 ner i le' fen on said overlapping end and a detent pivoted on saidsupporting frame to engage said lug When the clamp is in its contractedform. Intestimony whereof We have signed our names to thisspecification.

WILLIAM HERBERT MOCANDLISH. ALFRED BERNARD ROBSON.

end tosaid frame and extending in a circular formation therefrom so thatthe other end overlaps the first end, a tension member forming anextension of the said overlap- 5 ping end, a guide on said supportingframe for said tension member, a lever for applying tension to saidtension member, a lug this patent may be obtained for five cents. each,by addressing the Commissioner of Patents,

Washing-ton, D. G.

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